Replacement for 401231-B31: Drop-In Alternatives We Stock
Looking for a replacement for the 401231-B31 (401231-B31 - Compaq 500-Watts Power Supply for ProLiant ML750 Server)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 401231-B31
| SKU | 401231-B31 |
|---|---|
| Product | 401231-B31 - Compaq 500-Watts Power Supply for ProLiant ML750 Server |
| Current price | $380.67 |
| Stock status | In Stock |
| Detail page | View 401231-B31 › |
Drop-in replacements for 401231-B31
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
401231-001 - HP 500-Watts Redundant Hot-Pluggable Power Supply for Proliant ML750 DL760 8000 8500
SKU: 401231-001
Price: $105.26
506077-002 - HP 500-Watts 100-240V Power Supply for ProLiant DL320 G6/ DL160 G6 Server
SKU: 506077-002
Price: $52.63
723597-B21 - HP 500-Watts Flex Slot Platinum Hot-Pluggable Power Supply Kit for ProLiant DL360/ DL380/ ML350 Gen9 Server
SKU: 723597-B21
Price: $54.74
DPS-500GB-H - HP 500-Watts Switching Power Supply with PFC for ProLiant DL140/ DL145 G2 Server
SKU: DPS-500GB-H
Price: $211.00
622381-101 - HP 500-Watts 100-120V 5A Power Supply for ProLiant DL320 G6/ DL160 G6 Server
SKU: 622381-101
Price: $211.00
283665-B21 - HP 500-Watts Redundant Power Supply for Proliant ML350 Gen3 Server
SKU: 283665-B21
Price: $574.99
R1T38A - Aruba Networks 500-Watts Power Supply for HPE Aruba ProLiant DL360 Gen10 Server, Airwave Multivendor
SKU: R1T38A
Price: $1,305.09
339317-001 - HP ProLiant ML370 G3 Intel Xeon 3.06GHz CPU 1GB DDR SDRAM RageXL 8MB 110/220V AC 500-Watts Power Supply 5U Rack-Mountable Server System
SKU: 339317-001
Price: $1,823.16
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.